Fuel pump



March 22, 1932. G F, NOLTEIN 1,850,083

FUEL PUMP Filed Oct. 7, 1929 6 Sheets-Sheet l fi J INVENTOR aa nmzrnm ATTORNEY March 22, 1932. G. F. NOLTEIN FUEL PUMP Filed Oct. 7, 1929 s Sheets-Sheet 5 lllllIT T ll |l| Llllllll Fla. 4.

IN V/iNTOR GEO/76f l /V01 7274'.

March 22, 1932. NOLTEIN 1,850,083

FUEL PUMP Filed Oct. 7, 1929 6 Sheets-Sheet 4 FROM HAM/0 Puh GEORGE E N01 75/.

B M WWW .4 TTORA'E Y March 22, 1932. G. F. NOLTEIN FUEL PUMP 6 Sheets-Shea? Filed 001,. 7, 1929 March 22, 1932. 3 NOLTE|N 1,850,083

FUEL PUMP Filed Oct. 7, 1929 6 Sheets-Sheet 6 4 rm {H Jrwowlw GEORGE E ll/OZ TEl/ll.

P Z r m Z Patented Mar. 22, 1932 UNITED STATES PATENT OFFICE GEORGE F. NOLTEIN, OF SPRINGFIELD, OHIO, ASSIGNOR TO SUPERIOR ENGINE COM- PANY, IN 6., SPRINGFIELD, OHIO,

A CORPORATION OF DELAWARE FUEL PUMP Application filed October 7, 1929. Serial No. 397,850.

My invention relates to fuel pumps, and, in particular, to pumps for injecting fuel into internal combustion engines.

It is my object to provide a pump driven from a cam shaft, which turns at half crankv shaft speed, so that the crank shaft speed.

It is a further object to provide a pump that may be hand operated for starting in cooperation with the power operated pump so that fuel pump is operated at starting purposes until the pump gets under way mechanically for carrying on the pumping operation.

It is a. further object'to provide a combined low pressure delivery from the main tank to the day tank and a constant high pressure to the engine.

Referring to the drawings: 7

Figure 1 is a top plan view of the pump;

.igure 2 is a section on the line 22 of Figure 1;

Figure 3 is an end elevation of the right hand end of the pump;

Figure 4 is an end elevation of the left end of the pump; 7

Figure 5 is a diagrammatic view showing 4 the piping interconnecting the ends of the pp y;

pump into a single system and connecting both ends to the engine and to the source of Figure 6 is a section through the low pressure pump and one of the high pressure pumps on the line 6-6 of Figure 1;

Figure 7 is a horizontal section on the line 77 of Figure 3;

Referring to the drawings in detail, it will be understood that the general purpose of my arrangement of parts is to first draw fuel by a low pressure tank and deliver itto what is known as a day tank in which suffi'cient fuel 'is"maintained for the purpose of currentoperation of the'particular'engine o'f whichthe apparatus': forms a part;

o n a. substantially *constant pressure "ma. f

may be injected by hand for,

pump from a main storage The fuel from theday. tank is'then drawn from thedaytank by the pair'ofhigh"pressurepumpsI have pm id m v whichdelivers th'e fuel 'inafconstant'stre'am j iwl h. v p I ls si ipti nffhe e liafter wil a ply: aa he valves 17and'18." The incoming fuel lifts the i \In addition to the foregoing pumping apparatus operated as a unit from acommon source'of power, I provide av hand operated pump' which enables the engine to be started and the fuel to be injected under pressure.

With this understanding of the general ar-. rangement of the tion and the objectives to be obtained the following is a detailed description of the parts, their assembly and their operation. pump is provided with a supporting base 1, which supports the casing for the operating cams, hand lever, hand pump, low pressure pump and the pair of high pressure pumps. This casing is provided with acentral chamber 2 through the walls of which projects the camshaft 3 having on it the high pressure pump'cams 4 and 5 which slightly overlap in order to insure continuity of operation and of oil delivery from the high pressure pumps.

several parts of my inven- The Cam 5 also serves to operate the low pressure pump as well as one of the high pressurepumps. The cam shaft 3 is driven from the engine by the gear 6. It is supported on bearings 7. The cam case 2 is provided with a lubrication oil inlet 8 and outlet 9.

Hand pump The hand pump consists of a handle 10 the lower endof which 11 engages the hand pump piston rod 12 and moves it against the resistance of the spring 13 in the cylinder 14. A piston 15 is mounted within thiscylin-- der on the piston rod 12. The inward movement of the piston and piston rod draws fuel from the day tank through the inlet pipe 16 into the inlet valve 17 through the outlet valve18 out. of port'1 9 in the pipe 20 and I thence tothe engine. As the valves 17 and '18 z arethe same as the'yalves used inconnection,

thijh h. p s p mps... .iheaean valves in 17 and the outgoing fuel seats the valve in 17 and lifts the valve in 18.

Low pressure pump Upon starting the engine the rotation of the cam shaft 3 sets in operation the low pressure pumps and the high pressure pumps. The low pressure pump consists of a .piston 21 working in the cylinder 22 against the spring 23. Fuel from the main tank is drawn in through the pipe 24 and passes through the inlet valve 25 and out through the outlet valve 26 into the outlet pipe 27 which communicates with the day tank. The day tank is connected with a pipe 28 to the hand pump line 16 and to the high pressure pumps by the line 29. The low pressure pump is operated by the cam 5 engaging the roller 30 carried on the sliding cross head 31. 'This cross head is lubricated from the cam chamber 2.

H z'gh pressure pumps The low pressure fuel delivery to the pipe 29 enters through the passageway 32. Apart of the fuel is drawn in through one of the high pressure pumps and discharged into the discharge line 33. Hence, it passes to the engine. A part of this incoming oil crosses over through the passageway 34 and enters the other high pressure pump. Hence, it makes its exit through the pump valves into the common passageway 33 to the engine.

As these pumps are substantially alternately operated and while one is discharging the other is taking in fuel, a common supply line can beutilized with a common exit line.

The high pressure pumps are operated by the cams 4 and 5. In the case of one of the pumps the cam engages the end of a skirted piston 35 which operates within a cylinder 36. This piston on the inner sides thereof engages with the one end of the piston rod 37 which also forms a piston within the cylinder 38. A spring 39 is located between the inside of the piston 35 and the outside of the cylinder 38 to resist the inward movement of the piston rod and piston in the cylinder 38.

In the case of other of the pumps a roller 40 is interposed between the piston 35 and the cam 5, but this is simply an alternate con struction. V

All of the valve constructions in this pump, whether for the hand pump, the low pressure pump or the high pressure pumps, are identical. By removing the bolt 41 and the screw plug 42 the entire valve assembly for both inlet and exit valves can be bodily removed.

When the incoming fuel enters throu h 32 it passes through the side ports 43 o the valve member 44. It thence passes through a center port 45 through the center of the movable valve member 46 and also through its side ports 47 through the center of and around the sides of the spring pressed inlet valve 48 which is held seated by the spring 49 that is. located between it and the exit valve member 50. The exit valve member is held seated by the spring 51 beneath the screw plug-42.

Thus upon the movement of the piston and piston rod 37 to the right a suction is set up which draws fuel in lifting the valve member 46 and the valve member 48 against the spring 49 and upon the movement of the piston rod and piston 37 to the left the pressure created seats the valve 48. If it is not seated, the valve member 46 will be seated by the pressure, thereby insuring against leakage. The pressure lifts the valve 50 and the fuel makes its exit through the common exit line 33.

It will be understood that I desire to comprehend within my invention such modifications as may be clearly embraced within the scope of my claims and invention.

Having thus fully described my invention,

what I claim as new and desire to secure by Letters Patent is:

1. In combination with a delivery pipe, a

main supply and a subsidiary supply, a hand pump, a low pressure pump and a high pressure pump, power means for operating the low pressure and high pressure pumps and means connecting the hand pump and the high pressure pump to the subsidiary supply and to the delivery pipe and the hand pump and the low pressure pump to said supplies.

2. In com ination with a delivery pipe and sources of supply, a hand pump, a high pressure pump, a, low pressure pump, power means for operating the low pressure and high pressure pumps, pipe means leading from the hand pump and the high pressure pump to the delivery pipe and a pipe means connecting the hand pump, the high pressure 3 pump and the low pressure pump to said sources of supply, and independent valve means in each of said pumps.

3. In combination with a delivery pipe, a main supply and a subsidiary supply, a com mon power means, synchronously successive operated high pressure pumps, a synchronously operated low pressure pump adapted to move fuel from a main supply to a subsidiary supplfy, said high pressure pumps moving fuel rom the subsidiary supply to the delivery pipe, means interconnecting said high pressure pumps to the subsidiary supply and to the delivery pipe whereby there is a continuous flow of fuel under constant pres- H sure on the supply to the delivery pipe and a hand pump connected on the one hand to the subsidiary supply of the low pressure pump and on the other hand to the high pressure delivery to the delivery pipe and pressure pumps.-

4.. In a unitary fuel pumping system, in combination with a delivery pipe, a main supply and a subsidiary supply, a driven power means, alow pressure pump driven thereby r connected to a mainsource of supply and a subsidiary supply, high pressure pumps driven thereby connected to the subsidiary supply and to the delivery pipe and a handpump interposed between the high ressure supply to the delivery pipe and the su sidiary supply independently operated of said ower means but connected into said system flir cooperative action therewith. I

5. In a unitary fuel pump system, in combination with a delivery pipe, a main supply and a subsidiary supply, a driven power means, a low pressure pump driven thereby connected to a main source of supply and a c interposed between the subsidiary supply, high pressure pumps driven thereby connected to the subsidiary supply and to a delivery pipe, a hand pump high pressure supply to the delivery pipe and the subsidiary supply independently operated of said fpower means but connected into said system or cooperative action therewith and inlet and exit valves for each of said pumps.

6. In a unitary fuel pumping system, in combination with a delivery pipe, a main supply and a subsidiary supply a driven power means, a low pressure pump driven thereby connected to the main source of supply and to the subsidiary supply, high pressure pumps driven thereby connected to do the sudsidiary supply and to the delivery Ill) other b pi e, a hand pump interposed between the de ivery pipe and the subsidiary supply independently operated of said power means but connected into said system for cooperative action therewith and inlet and exit valves for each of said pumps, said valves being of the same character whereby the fuel is metered by said valves on a uniform basis.

7. In a pumping apparatus, in combination with a delivery pipe and a source of supply a pair of pumps having associated inlet and exit valves, one operated 'by hand and the power means for connecting the outlet of t e power pump to a source of supply and the inlet of the hand pump to the same source of supply, means of connecting the hand pump outlet side to the delivery pipe, power pumps connected to said same source of supply on the inlet and to said delivery ipe on the outlet side, each of saidpumps iaving inlet and outlet valve in pairs.

8. In a pumping apparatus, in combination with a delivery pipe. and a source of supply a pair of pumps having associated inlet and exit valves, one operated 'by hand and the other by power, means for connecting the outlet of the power pump to a source" of supply and the inlet of the hand pump to the same source of supply, means of connecting the hand pump outlet side to the delivery pipe, power pumps connected to said same source of supply on the inlet sides and tosaid de-. livery pipe on the outlet sides, each of-said last named pumps having inlet and outlet sure pump and a low valves in pairs, and interconnecting with one another having 'a'common inlet and a common outlet.v

9. In a pumping apparatus, in combination with a delivery pipe and a source of supply a pair of pumps having associated inlet and exit valves, one operatedby hand and the other by power, means for connecting the outlet of the power pump to a source of supply and the inlet of the hand pump to the same source of supply, means of connecting the hand pump outlet side to the delivery pipe, another power pump connected to said same source of supply on the inlet and to said delivery pipe' on the outlet side, each of said pumps having inlet and outlet valves in pairs and interconnecting with one another, having a common inlet and a. common outlet.

10. In combination with a delivery pipe, a main supply and a subsidiary supply, a power shaft, cams'thereon, a casing enclosing said cams and forming a lubricant container, cross-head slides actuated by said cams reciprocating the guide in said casing and lubricated therefrom, inders associated with each of said crossheads and partially inclosed thereby and actuated by each of said cams and inlet and outlet valves associated with each cylinder, piston and piston red, one of said pumps adapted to deliver fluid at a lower pressure than the other but all of the pumps being synchronously driven from the common power means, said low pressure pump being connected to the main source of supply on one side and the subsidiary source of supply on the other and a hand operated pump, the high pressure pump and the hand pump havmg a common connection to the subsidiary supply and a common outlet to the delivery pipe. 7 V

11. In combination with a delivery pipe, a main supply and a subsidiary supply, a power shaft, c'ams thereon, a casing enclosing said cams, cross head slides actuated by said cams reciprocating in the guide of said casing and lubricated therefrom, a two-part high prespressure pump having pistons, piston rods and cylinder associated with said cross-heads and partially inclosed thereby and actuated by each of said cams and outlet and inlet valves associated with each cylinder, piston and piston rod, one of said pumps adapted to deliver fluid at a lower pressure than the other but all of the pumps being synchronously driven from the common power means, said low pressure pump being connected to the main source of supply on one side and the subsidiary source of supply on the other and a hand operated pistons, piston rods and cylpump, the high pressure pump and the hand that the parts of the high pressure pump will operate substantially alternately.

12. In combination with a delivery ipe, a main su ply and a subsidiary supp y, a

; power sha t, cams thereon, a casing encloschronously driven from the common power means, said low pressure pump being connected to a main source of supply on one side and a subsidiary source of supply on the other, a hand pump connected to said subsidiary source of supply, a high pressure pump having a common connection to the subsidiary supply with said hand pump and a common outlet for said hand pump and the high pressure pump,said cam being so arranged that the parts of the high pressure pump will operate substantially alternately and said low pressure pump and one of the high pressure pumps will be operated substantially simultaneously'.

13. In a fuel pumping mechanism, a main casing having a vertical cylinder with an inlet and outlet port, a horizontal cylinder connected intermediate thereof with the vertical cylinder, a piston and piston rod in the horizontal cylinder, inlet valve mechanism between the inlet port of the vertical cylinder and its communication with the horizontal cylinder, an outlet valve between the communication of the horizontal and vertical cylinder and the outlet port, yielding means between said valves to maintain the inlet valve seated, yielding means between the end of the vertical cylinder and the outlet valve to maintainit seated, a loosely mounted supplementary valve member between the inlet port and the inlet valve adapted to close the inlet port if the inlet valve does not seat, a supplementary supporting casing in the vertical cylinder for supporting said valves and means for detachably mounting said casing within said cylinder for withdrawal of the casing and valves as a unit from the cylinder.

14. In a fuel pumping mechanism, a system consisting of a high pressure pump and a low pressure pump, said high pressure pump consisting of a pair of spaced pumps each having an inlet and an outlet valve mechanism, an inlet to one pump, an outlet from said outlet valve mechanism between the pumps, communication between the inlet valve mechanisms, and means for operating said high pressure pumps to produce a continuous stream through the outlet to deliver to a delivery pipe, and a hand operated pump having its outlet connected to the delivery plpe.

15. In a fuel pump, in combination with a main supply and a subsidiary supply, a low pressure pump connected to both supplies, a supply pipe connected to said subsidiary supply, a delivery pipe, a hand pump and ahi h pressure pump connected on their intal ie sides to the supply pipe and on their outlet sides to the delivery pipe, and a common operating means for said low pressure pump and said high pressure pump.

16. In a fuel pump, in combination, a high pressurepump, a low pressure pump, a hand pump and a delivery pipe, the high pressure pump and hand pump each being connected on its outlet side to the delivery pipe and each having a connection on the intake side with the low pressure pump.

17. In a fuel pump, a casing, a high pres sure pump in one end of said casing, a low pressure pump and a hand pump in the other end of said casing, a connection between the outlet side of the low pressure pump and the intake sides of the other pumps, and a delivery pipe connected to the outlet sides of the hand pump and the outlet side of the high pressure pump.

18. In a fuel pump, a casing, a high pressure pump in one end of said casing, a low pressure pump and a hand pump in the other end of said casing, a connection between the outlet side of the low pressure pump and the intake sides of the other pumps, a delivery pipe connected to the outlet sides of the hand pump and the outlet side of the high pressure pump, and means in said casing for operatingthe pressure pumps.

19. In a fuel pump, a casing having at one end a pair of cylinders and at the other end a cylinder and a lever, a pair of pumps on each end of the casing, each of three of said pumps having a piston extending into one of said cylinders, the other of said pumps having means to be engaged by the lever whereby the pump is operated, and means in said casing to engage said pistons to operate the three pumps.

20. In a fuel pump, a casing having between each end and its center a partition, a pair of cylinders in one partition and a single cylinder in the other partition, a pump cylinder for each cylinder havin an op erative'piston therein, cams in sa1d casing engaging said pistons for operating said pumps, and a lever and a lever-operated pump in said casing adjacent the single cylinder, said lever being supported by said casing.

In testimony whereof, I afiix my signature.

GEORGE F. NOLTEIN. 

